common:kem: Factor out a function to retrieve ECC parameters.
5e623b71d5ce
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Description

common:kem: Factor out a function to retrieve ECC parameters.

* common/util.h (struct gnupg_ecc_params, gnupg_get_ecc_params): New.
(ECC_SCALAR_LEN_MAX, ECC_POINT_LEN_MAX, ECC_HASH_LEN_MAX): New.
* agent/pkdecrypt.c (ecc_extract_pk_from_key, ecc_extract_sk_from_key):
Follow the change of gnupg_get_ecc_params.
(ecc_raw_kem, ecc_pgp_kem_decap, composite_pgp_kem_decrypt): Likewise.
(ecc_kem_decrypt): Likewise.
(get_ecc_params): Move to...
* common/kem.c (gnupg_get_ecc_params): ... here
* g10/pkglue.c (ECC_POINT_LEN_MAX, ECC_HASH_LEN_MAX): Remove duplicates.

GnuPG-bug-id: T7649
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>